diff options
Diffstat (limited to 'llvm/lib/CodeGen/SplitKit.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SplitKit.cpp | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/llvm/lib/CodeGen/SplitKit.cpp b/llvm/lib/CodeGen/SplitKit.cpp index 6d59f85d35f..e06bc4a3614 100644 --- a/llvm/lib/CodeGen/SplitKit.cpp +++ b/llvm/lib/CodeGen/SplitKit.cpp @@ -1206,7 +1206,8 @@ void SplitEditor::rewriteAssigned(bool ExtendRanges) { // defining the register. This is because a <def,read-undef> operand // will create an "undef" point, and we cannot extend any subranges // until all of them have been accounted for. - ExtPoints.push_back(ExtPoint(MO, RegIdx, Next)); + if (MO.isUse()) + ExtPoints.push_back(ExtPoint(MO, RegIdx, Next)); } else { LiveRangeCalc &LRC = getLRCalc(RegIdx); LRC.extend(LI, Next, 0, ArrayRef<SlotIndex>()); @@ -1221,10 +1222,6 @@ void SplitEditor::rewriteAssigned(bool ExtendRanges) { unsigned Reg = EP.MO.getReg(), Sub = EP.MO.getSubReg(); LaneBitmask LM = Sub != 0 ? TRI.getSubRegIndexLaneMask(Sub) : MRI.getMaxLaneMaskForVReg(Reg); - // If this is a non-read-undef definition of a sub-register, extend - // subranges for everything except that sub-register. - if (Sub != 0 && EP.MO.isDef()) - LM = MRI.getMaxLaneMaskForVReg(Reg) & ~LM; for (LiveInterval::SubRange &S : LI.subranges()) { if (!(S.LaneMask & LM)) continue; |
